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21031 (1989 TO15)
Classification: Main-belt Asteroid          SPK-ID: 2021031
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .232165828440303 4.55e-08  
a 2.310173818967898 1.0915e-08 AU
q 1.773830400446118 1.016e-07 AU
i 2.579308805677119 6.4103e-06 deg
node 199.482477971656 0.00011811 deg
peri 221.2819347228032 0.00011985 deg
M 29.76833437034376 1.6254e-05 deg
tp 2456894.448345594573
(2014-Aug-24.94834559)
5.7818e-05 JED
period 1282.523741872114
3.51
9.0896e-06
2.489e-08
d
yr
n .2806965580804796 1.9894e-09 deg/d
Q 2.846517237489679 1.3449e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      810  
   data-arc span      9304 days (25.47 yr)  
   first obs. used      1989-10-03  
   last obs. used      2015-03-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50863  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 17:08:03  

Additional Information
 Earth MOID = .787091 AU 
 T_jup = 3.547 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6 mag n/a MPO231562  

21031 (1989 TO15)          Discovered 1989-Oct-03 by Debehogne, H. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1989 TO15 = 1994 CW2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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